Afghanite and Herderite Physical Properties

Afghanite and Herderite Chemical Formula

While comparing Afghanite and Herderite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Afghanite and Herderite chemical formula.

• Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
• Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Afghanite and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.